iFixit - Answers With Device "Auto Part"

700R4 transmission: Is the 700R4 interchangeable with the Turbo 350?

Sat, 06 Sep 2025 18:24:28 -0700

Probably I will get nailed for this one, but here goes.

I have a 1986 Chevy K20 Pickup. It originally came with a Turbo-Hydramatic 350 transmission. It has a 700R4 installed now, which is shot. Will I be able to re-install a T350 with no other wiring or tubing modifications? Should I just be safe and find another 700r4 and throw it in?

Off computer topic I know, but hey do I care? There is a big knowledge base out there.

Regards,

Frank

⟐ Commented Eylül 06, 2025 at 18:24 GMT-7

Engine: Starter turns engine over twice and then stops completly

Wed, 13 Aug 2025 00:14:26 -0700

I recently overheated and the car died. Upon trying to restart the car I turn the key and hear a single click. Thinking it was the starter I took the start to autozone to have it tested and they said it passed. I also exchanged my battery just in chase. After putting the starter and the battery back in I try to turn it over again. I will get two, sometimes 1 turn over and then the starter will just stop. the gauge lights will come on and turn off when trying to start then come back on once I stop. There is no check engine light after the initial few seconds its on when you first turn the key and the fuel pump engages. I am wondering if it is possible the engine seized up but it will roll in drive and reverse (automatic) but I wasnt able to get it to turn using the crank pulley and a socket. Not sure how much force I am suppose to use to turn it but it was extremely hard and I was in fear of possibly breaking something so I didnt over due it.

Summary: When I turn the key I will get 1 or 2 very slow cranks from the starter and then nothing at all. No noise no spark.

Upon inspecting the engine I do see gas on the fuel line as well as tips of spark plugs

I can push the car in drive and reverse but I havent been able to turn it using a socket and the crank pulley.

When I try to start it the positive wire on the battery terminal to the starter gets warm. im assuming due to a bad ground which they all looked good or because the starter is pulling to much power because turning the engine is to challenging due to it possibly being “partially” seized… paradoxical

⟐ Answered Ağustos 13, 2025 at 0:14 GMT-7

700R4 transmission: Why is my 700R4 completely frozen?

Thu, 27 Mar 2025 12:55:58 -0700

After sitting for a month or so, my 700R4 transmission is completely locked up. I start the engine, but when I put it in gear, it slams into gear violently and the engine dies regardless of the RPM. I jacked the rear wheels off the ground and it does the same thing without the wheels even slightly turning. I can rotate the wheels quite easily by hand while on jack stands.

Any thoughts on this greatly appreciated.

Brakes: Whole wheel fell out.

Sun, 17 Nov 2024 17:11:29 -0700

As You can see on the image, whole wheel fell out. I don't know anything about repairing cars and I can't afford mechanic right now, all I know it's a bearing failure. If anyone knows how to fix it step by step or is willing to send me a video of someone repairing it I would be thankful 🫶🏼.

⟐ Commented Kasım 17, 2024 at 17:11 GMT-7

Brakes: Why my break pad wear fast

Tue, 17 Sep 2024 04:43:07 -0700

Why my break pad wear fast

⟐ Answered Eylül 17, 2024 at 4:43 GMT-7

700R4 transmission: 700 R4 … 1990 Sierra , have reverse and 1 nothing else

Mon, 08 Jan 2024 16:48:42 -0700

I can feel it engage in OD D and 2 but it won’t move.

700R4 transmission: Why won't my 700r4 downshift?

Mon, 13 Nov 2023 03:18:18 -0700

t.v. cable adjusted properly, spool valve works, and governer is fine but when applying throttle car will not downshift. converter will unlock but no downshift. when slowing to a stop trans downshifts though slightly delayed. trans wasn't overheated and has less than 8000 miles.

⟐ Commented Kasım 13, 2023 at 3:18 GMT-7

700R4 transmission: What would cause the bell housing to crack

Sat, 11 Nov 2023 14:04:19 -0700

What Would cause the bell housing to crack on a 700r4

⟐ Commented Kasım 11, 2023 at 14:04 GMT-7

Duralast Valeo AB170094 12V Alternator: How to make it in home

Fri, 25 Aug 2023 04:53:46 -0700

I am worrying about my school's science exhition to make an alternator.I need some guidance in how to make it in a simple way.please answer my question.

⟐ Commented Ağustos 25, 2023 at 4:53 GMT-7

700R4 transmission: Why wont it shift?

Sat, 15 Jul 2023 19:04:33 -0700

Well i have more of a qiestion. I have a 1984 gmc trk with the 700 r4 and it wont shift? There are shift silanoids and i dont no what they do but i think shift ? So i was gonna chamge.them to see if that helped i think i can save it i hope

⟐ Commented Temmuz 15, 2023 at 19:04 GMT-7

700R4 transmission: will not shift into 3rd just slips.

Fri, 03 Mar 2023 19:23:42 -0700

I installed a 700r4 in my 60 chevy. It only shifts 1st to 2nd it slips when it goes to 3rd. does this have any thing to do with the TV cable not being conected?

⟐ Commented Mart 03, 2023 at 19:23 GMT-7

chevrolet Duramax 6.6 LB7: crank no start: no codes, no fuel at primer, rattle from engine

Fri, 13 Jan 2023 09:35:45 -0700

2002 6.6 lb7 Duramax will not start. Engine was making rattle sound. Sounded almost like a sheet metal vibration but RPM sensitive, coming from low in engine.. There are no codes. Not getting fuel at primer bleed off. no signs of water in fuel. Thanks, Terry

⟐ Answered Ocak 13, 2023 at 9:35 GMT-7

700R4 transmission: My trans has all gears but drive when in drive its like neutral

Mon, 11 Jul 2022 09:58:49 -0700

700r with 350 stock everything shifts out fine but when in drive it does nothing like it has two neutrals

Engine: Rocam 1.3 one spark plug gets wet

Wed, 11 May 2022 11:57:23 -0700

Rocam 1.3 one spark plug gets wet from petrol

⟐ Commented Mayıs 11, 2022 at 11:57 GMT-7

Engine: Why does my 4.3 v6 run wide open

Thu, 10 Mar 2022 18:27:01 -0700

Why does my 4.3 v6 run wide open

⟐ Commented Mart 10, 2022 at 18:27 GMT-7

chevrolet Duramax 6.6 LB7: Repairing the injectors - clean or replace

Sun, 26 Dec 2021 15:43:03 -0700

Motor has 250,000 + miles and is emitting smoke at idle. Is there a way to clean the injectors or do they need to be replaced?

⟐ Commented Aralık 26, 2021 at 15:43 GMT-7

700R4 transmission: Transmission won’t go into reverse

Wed, 17 Nov 2021 21:37:09 -0700

But shifts fine through all other gears.

⟐ Answered Kasım 17, 2021 at 21:37 GMT-7

chevrolet Duramax 6.6 LB7: What wire goes where off a and b stud to power distribution a and b

Sun, 07 Nov 2021 19:13:13 -0700

at the a and b studs, that supply power to the maxi fuse section and the mini and relay section of power distribution box, _{, how do you know which wire goes where on top………….. the maxi fuse has an a and b bolt to connect to, also the box with relays and mini fuses has a stud on both sides} marked a and b.

ive read that my lb7 has battery one which is to ecu and starter_{,, and the 2nd battery known as the auxillary battery is after diesal starts 2nd battery is for this},,,, also states there is a iso( isolator) keeping 2nd battery from draining battery one…….

need to know correct connect _{,, when i got the truck the thick red wire and medium sized red wire appeared to have been mended together and broke}, therefore leaving me not knowing what went where.

Engine: Pull cord wonyu pull ôt retract

Fri, 06 Aug 2021 15:44:00 -0700

I habé a huasheng 49cc 4 stroke (engine model 142f) and im pretty sure the oil isi full, the pull cord wouldnt pull but 4 inches. I took the flywheel off and it functions fine, the flywheel rotor rotates about half a turn either way and locks up, after rtying to re-align the rotor and flywheel, also discovered it does not retract unless the disconnected. It sat 3 or 4 days in heavy rain. I needed to chamge a sparkplug, i overtighened the ol sparkplug and it fell apart, i got the last peice from behind the flywheel roter but had no effect. I already tried to turn it when the sparkplug was out to loose compression. Does has anyone had this probem that could help?

700R4 transmission: tranny suddenly quit shifting.

Wed, 24 Feb 2021 11:27:31 -0700

I pulled into a parking spot. When I went to back out, the suburban would not shift into reverse. I shifted into drive and that didn't work either. I shifted back into park, and there was a noise like gear teeth slightly connnecting out of synch.

I shifted back into reverse, and shut the motor off...

what would be the most likely problem??

Thanks much....

⟐ Commented Şubat 24, 2021 at 11:27 GMT-7